Exuberant Ctags

There are a few extensions I have put in my ctags.cnf file:

--langdef=sqlunit
--langmap=sqlunit:.xml
--regex-sqlunit=/^[ \t]*<[ \t]*connection.*>/connection/c,connection/i
--regex-sqlunit=/^[ \t]*<[ \t]*setup.*>/setup/s,setup/i
--regex-sqlunit=/^[ \t]*<[ \t]*teardown.*>/teardown/d,teardown/i
--regex-sqlunit=/^[ \t]*<[ \t]*test.*name="([^"]+)".*>/\1/t,test/i

--langdef=ant
--langmap=ant:.xml
--regex-ant=/^[ \t]*<[ \t]*project.*name="([^"]+)".*/\1/p,project/i
--regex-ant=/^[ \t]*<[ \t]*target.*name="([^"]+)".*/\1/t,target/i

--regex-php=/^[ \t]*if[ ]*[(]+[ \t]*\$act(ion)?[ \t]*==[ \t]*"([a-zA-Z0-9
]+)"/\
2/A,action/i

--langdef=dosbatch
--langmap=dosbatch:.cmd,.bat
--regex-dosbatch=/^:([a-zA-Z0-9_]+)/\1/l,label/i
--regex-dosbatch=/set[ ]+([a-zA-Z0-9_]+)/\1/v,variable/i

--regex-perl=/\[%[ ]+BLOCK[ ]+([a-zA-Z0-9]+)[ ]+%\]/\1/t,template/i

--langdef=asterisk
--langmap=asterisk:.conf
--regex-asterisk=/^\[(.*)\]/\1/c,context/i
--regex-asterisk=/^#include[ \t]+(.*)/\1/i,includes/i



Of these, the ones I would like to create a simple parser for are:
Ant - build.xml
Dosbatch .cmd,.bat

Any see any issues going ahead an creating some parsers for them?

Thanks,
Dave